sick fingerlimes

[Josito]

Hi friends, I need your help I have these finger limb shoots but suddenly there has been a darkening and they have thrown their leaves and the branches, stems and thorns look black or brown, in general dark terms.

What could you be will be a fungus?
What I can do

[lebmung]

Too much sun exposure perhaps. What are they cuttings or seedlings?

[Josito]

Hi, they are seedlings

[Bomand]

With seedlings, extreme sun exposure can damage them.....as can other factors. Factors such as:
Contaminated potting soil.
Too much water, low light and low temps.
    It looks to me that your seedlings are suffering from twig die back....caused by any of the above. If you are applying fertilize ....the be careful not to over do it. The seedlings look to big to be affected by damping off. Fingerlimes sometimes suffer from environmental changes.....moving them to a different place will sometimes cause  dieback. Give us a little history. How old are the seedlings?

[Josito]

Hi thank you for your comments, well they started sproud between May and June they may have around 7 or 8 months, I have them under roof with indirect sunlight, but at this moment in the afternoon there`s a lot of direct sun and also my cat has thrown them to the ground a couple of times.

Regards,

José